Stakeholder perspectives on biosimilars in oncology
Posted 05/10/2018

Monoclonal antibody biosimilars represent a novel advance in the field of oncology, and their integration into routine clinical practice present challenges for clinicians, nurses, patients and regulators. Researchers therefore investigated the perspectives stakeholders including a clinician, specialist nurse, patient advocate, regulator and economist on optimizing the uptake of monoclonal antibody biosimilars in the treatment of cancer [1].

The first oncology biosimilars were approved in the European Union (EU) in 2017 [2]. However, since then many more have been approved. To date (October 2018), six rituximab, one bevacizumab and four trastuzumab biosimilars have been approved, and others are on the way. One biosimilar application for trastuzumab, two for rituximab and one for trastuzumab are under consideration by the European Medicines Agency (EMA) [3].

CliniciansFrom the perspective of the clinician, important considerations in relation to biosimilars include the need for scientific data and guidance to enable them to have informative discussions with patients. Requirements include:

comprehensive information on the results of clinical trials conducted to support the marketing authorization of biosimilars

data relating to extrapolation, interchangeability (switching and substitution) and immunogenicity

awareness of the pharmacovigilance plan (risk management plan).

This body of data, according to the authors, ‘should be transparent and easily accessible, with the Summary of Product Characteristics (SmPC) and the European Public Assessment Report (EPAR) representing an invaluable source of information’.

NursesSpecialist cancer nurses are responsible for ensuring the patient receives the exact medicine prescribed (type of medicine, dose, administration route and timing) and can play an important role in instructing patients on handling different medicine presentations, e.g. use of prefilled syringe versus an autoinjector.

However, concerns expressed by such nurses include the ad hoc nature of training for nurses on new biosimilars, with more effort being given to training clinicians. In fact, a 2011 survey by the National Comprehensive Cancer Network (NCCN) that a lack of familiarity and need for comprehensive information (scientific, economic and expert opinion) were more commonly reported by nurses than by physicians or pharmacists. This highlights the need for training of specialist nurses in biosimilars.

PatientsIn 2014, a survey of patients perspectives on biosimilars was carried out by the European Federation of Crohn’s and Ulcerative Colitis Associations (EFCCA), an umbrella organization for over 30 patient associations.

The survey highlighted that many patients were unaware of biosimilars, while those who had heard of biosimilars expressed strong scepticism over extrapolation. While interchangeability was considered acceptable under certain conditions, transparency to properly understand their medication was paramount. Finally, traceability was noted as a concern, with patients expressing confusion over product naming and batches.

The results showed that patients want to be involved in the decision-making process and have concerns over sufficient patient education, extrapolation, switching, traceability, informed consent and access to information. This is where patient advocacy groups can play a role, building awareness among patient communities over issues impacting access to biologicals and biosimilars, and also contributing to patients’ basic understanding of the science and issues surrounding biosimilars.

Conflict of interestThe authors of the research paper [1] reported conflict of interest, including having received research grants and honoraria from pharmaceutical companies. For full details of the authors’ conflict of interest, see the research paper [1].

Editor’s commentReaders interested to learn more about stakeholder perspectives on biosimilars are invited to visit www.gabi-journal.net to view the following manuscripts published in GaBI Journal:

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